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As regukar ad Big Ben... .. .

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https://bugs.launchpad.net/bugs/1194222

Title:
  mythpreviewgen crashed with SIGSEGV in malloc_consolidate()

Status in Mythbuntu, Ubuntu derivative focused upon MythTV:
  New

Bug description:
  I was using mythweb on the backend machine to browse "Recorded
  Programs".  Apport-gtk popped up, responding to this segment
  violation.

  I don't actually know whata previewgen does and when, so I don't know
  if my browsing somehow invoked previewgen.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: mythtv-backend 2:0.26.0+fixes.20130624.cf2e05a-0ubuntu0mythbuntu1 [origin: LP-PPA-mythbuntu-0.26]
  ProcVersionSignature: Ubuntu 3.2.0-48.74-generic 3.2.46
  Uname: Linux 3.2.0-48-generic x86_64
  NonfreeKernelModules: nvidia
  .var.log.mythtv.mtd.log:
   mtd started at Sat Jan 8 00:13:43 2011
   mtd is running on a host called redblack
   00:13:43: Waiting for connections/jobs
   00:13:43: mtd is listening on port 2442
  .var.log.mythtv.mythavtest.log:
   
  .var.log.mythtv.mythccextractor.log:
   
  .var.log.mythtv.mythjobqueue.log:
   
  .var.log.mythtv.mythlcdserver.log:
   
  .var.log.mythtv.mythmediaserver.log:
   
  .var.log.mythtv.mythmetadatalookup.log:
   
  .var.log.mythtv.mythshutdown.log:
   
  .var.log.mythtv.mythtranscode.log:
   
  .var.log.mythtv.mythutil.log:
   
  .var.log.mythtv.mythwelcome.log:
   
  ApportVersion: 2.0.1-0ubuntu17.3
  Architecture: amd64
  CrashDB: mythbuntu
  Date: Mon Jun 24 14:08:18 2013
  ExecutablePath: /usr/bin/mythpreviewgen
  Installed_mythtv_dbg: 2:0.26.0+fixes.20130624.cf2e05a-0ubuntu0mythbuntu1
  MarkForUpload: True
  ProcCmdline: /usr/bin/mythpreviewgen --size 320x240 --chanid 1010 --starttime 20110829203000 --outfile /mythspace2/recordings/1010_20110829163000.mpg.-1.320x240.png --verbose general --loglevel info --quiet --syslog local7
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
  SegvAnalysis:
   Segfault happened at: 0x7fcb2a3c9df2 <malloc_consolidate+210>:	mov    0x8(%rbx),%rdx
   PC (0x7fcb2a3c9df2) ok
   source "0x8(%rbx)" (0x1019e5708) not located in a known VMA region (needed readable region)!
   destination "%rdx" ok
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: mythtv
  StacktraceTop:
   malloc_consolidate (av=0x7fcb2a703720) at malloc.c:4249
   malloc_consolidate (av=0x7fcb2a703720) at malloc.c:4226
   _int_free (av=0x7fcb2a703720, p=<optimized out>, have_lock=0) at malloc.c:4157
   ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
   ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
  Title: mythpreviewgen crashed with SIGSEGV in malloc_consolidate()
  UpgradeStatus: Upgraded to precise on 2013-03-01 (115 days ago)
  UserGroups: audio cdrom dialout video

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